#region License
/* 
 * Copyright (C) 1999-2022 John Källén.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#endregion

using Reko.Core;
using Reko.Core.Hll.C;
using Reko.Core.Rtl;
using Reko.Core.Services;
using System;
using System.Collections.Generic;
using System.IO;

namespace Reko.Environments.Windows
{
    public class Win32M68kPlatform : Platform
	{
		public Win32M68kPlatform(IServiceProvider services, IProcessorArchitecture arch) : 
            base(services, arch, "winM68k")
        {
		}

		public override string DefaultCallingConvention
		{
			get { return ""; }
		}

        public override CParser CreateCParser(TextReader rdr, ParserState? state)
        {
            state ??= new ParserState();
            var lexer = new CLexer(rdr, CLexer.MsvcKeywords);
            var parser = new CParser(state, lexer);
            return parser;
        }

        public override HashSet<RegisterStorage> CreateTrashedRegisters()
		{
			return new HashSet<RegisterStorage>();
		}

		public override CallingConvention GetCallingConvention(string? ccName)
		{
			return new M68kCallingConvention(this.Architecture);
		}

		public override ImageSymbol? FindMainProcedure(Program program, Address addrStart)
		{
			Services.RequireService<DecompilerEventListener>().Warn(new NullCodeLocation(program.Name),
				"Win32 M68k main procedure finder not supported.");
			return null;
		}

		public override SystemService? FindService(int vector, ProcessorState? state, SegmentMap? segmentMap)
		{
			//throw new NotImplementedException("INT services are not supported by " + this.GetType().Name);
			return null;
		}

		public override ProcedureBase? GetTrampolineDestination(Address addrInstr, IEnumerable<RtlInstruction> rtls, IRewriterHost host)
		{
			return null;
		}

		public override int GetBitSizeFromCBasicType(CBasicType cb)
		{
			switch (cb)
			{
            case CBasicType.Bool: return 8;
			case CBasicType.Char: return 8;
			case CBasicType.Short: return 16;
			case CBasicType.Int: return 32;
			case CBasicType.Long: return 32;
			case CBasicType.LongLong: return 64;
			case CBasicType.Float: return 32;
			case CBasicType.Double: return 64;
			case CBasicType.LongDouble: return 64;
			case CBasicType.Int64: return 64;
			default: throw new NotImplementedException(string.Format("C basic type {0} not supported.", cb));
			}
		}

		public override ExternalProcedure? LookupProcedureByOrdinal(string moduleName, int ordinal)
		{
			EnsureTypeLibraries(PlatformIdentifier);
			if (!Metadata.Modules.TryGetValue(moduleName.ToUpper(), out ModuleDescriptor mod))
				return null;
			if (mod.ServicesByOrdinal.TryGetValue(ordinal, out SystemService svc))
			{
				return new ExternalProcedure(svc.Name!, svc.Signature!);
			}
			else
				return null;
		}

		public override ExternalProcedure? LookupProcedureByName(string? moduleName, string procName)
		{
            if (moduleName is null)
                return null;
			EnsureTypeLibraries(PlatformIdentifier);
			if (!Metadata.Modules.TryGetValue(moduleName.ToUpper(), out ModuleDescriptor mod))
				return null;
            if (mod.ServicesByName.TryGetValue(moduleName, out SystemService svc))
            {
                return new ExternalProcedure(svc.Name!, svc.Signature!);
            }
            else
                throw new NotImplementedException();
        }
	}
}
